THE PROCESS BY WHICH DIFFERENT KINDS OF LIVING ORGANISMS ARE THOUGHT TO HAVE DEVELOPED AND DIVERSIFIED FROM EARLIER FORMS DURING THE HISTORY OF THE EARTH

A GROUP OF LIVING ORGANISMS CONSISTING OF SIMILAR INDIVIDUALS CAPABLE OF EXCHANGING GENES OR INTERBREEDING. THE SPECIES IS THE PRINCIPAL NATURAL TAXONOMIC UNIT, RANKING BELOW A GENUS AND DENOTED BY A LATIN BINOMIAL, E.G., HOMO SAPIENS.

A CHANGE OR DIFFERENCE IN CONDITION, AMOUNT, OR LEVEL, TYPICALLY WITH CERTAIN LIMITS.

SELECTIVE BREEDING IS THE PROCESS BY WHICH HUMANS BREED OTHER ANIMALS AND PLANTS FOR PARTICULAR TRAITS. TYPICALLY, STRAINS THAT ARE SELECTIVELY BRED ARE DOMESTICATED, AND THE BREEDING IS NORMALLY DONE BY A PROFESSIONAL BREEDER. ...

(NATURAL BREEDS) A LANDRACE IS A LOCAL VARIETY OF A DOMESTICATED ANIMAL OR PLANT SPECIES WHICH HAS DEVELOPED LARGELY BY NATURAL PROCESSES, BY ADAPTATION TO THE NATURAL AND CULTURAL ENVIRONMENT IN WHICH IT LIVES. ...

THE ACTION OR PROCESS OF ADAPTING OR BEING ADAPTED

THE CONCEPT OF VESTIGIALITY APPLIES TO GENETICALLY DETERMINED STRUCTURES OR ATTRIBUTES THAT HAVE APPARENTLY LOST MOST OR ALL OF THEIR ANCESTRAL FUNCTION IN A GIVEN SPECIES

THE ACTION OR PROCESS OF MUTATING.

1. THE STATE OR PROCESS OF A SPECIES, FAMILY, OR LARGER GROUP BEING OR BECOMING EXTINCT.

. THE REMAINS OR IMPRESSION OF A PREHISTORIC ORGANISM PRESERVED IN PETRIFIED FORM OR AS A MOLD OR CAST IN ROCK.